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Automorphisms of Chevalley groups of types A l , D l , E l over local rings without 1/2

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In this paper, we prove that every automorphism of a Chevalley group of type A l , D l , or E l , l ≥ 3, over a commutative local ring without 1/2 is standard, i.e., it is a composition of ring, inner, central, and graph automorphisms.

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  1. Moscow State University, Moscow, Russia

    E. I. Bunina

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Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 15, No. 7, pp. 47–80, 2009.

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Bunina, E.I. Automorphisms of Chevalley groups of types A l , D l , E l over local rings without 1/2. J Math Sci 169, 589–613 (2010). https://doi.org/10.1007/s10958-010-0062-3

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